*
* For licensing information, see the file 'LICENCE' in this directory.
*
- * $Id: wbuf.c,v 1.86 2005/02/05 18:23:37 hammache Exp $
+ * $Id: wbuf.c,v 1.92 2005/04/05 12:51:54 dedekind Exp $
*
*/
struct jffs2_inodirty *new;
/* Mark the superblock dirty so that kupdated will flush... */
- OFNI_BS_2SFFJ(c)->s_dirt = 1;
+ jffs2_erase_pending_trigger(c);
if (jffs2_wbuf_pending_for_ino(c, ino))
return;
int ret;
size_t retlen;
- /* Nothing to do if not NAND flash. In particular, we shouldn't
+ /* Nothing to do if not write-buffering the flash. In particular, we shouldn't
del_timer() the timer we never initialised. */
- if (jffs2_can_mark_obsolete(c))
+ if (!jffs2_is_writebuffered(c))
return 0;
if (!down_trylock(&c->alloc_sem)) {
BUG();
}
- if(!c->wbuf || !c->wbuf_len)
+ if (!c->wbuf_len) /* already checked c->wbuf above */
return 0;
/* claim remaining space on the page
if we have a switch to next page, we will not have
enough remaining space for this.
*/
- if (pad) {
+ if (pad && !jffs2_dataflash(c)) {
c->wbuf_len = PAD(c->wbuf_len);
/* Pad with JFFS2_DIRTY_BITMASK initially. this helps out ECC'd NOR
spin_lock(&c->erase_completion_lock);
/* Adjust free size of the block if we padded. */
- if (pad) {
+ if (pad && !jffs2_dataflash(c)) {
struct jffs2_eraseblock *jeb;
jeb = &c->blocks[c->wbuf_ofs / c->sector_size];
return ret;
}
+#ifdef CONFIG_JFFS2_FS_WRITEBUFFER
+#define PAGE_DIV(x) ( ((unsigned long)(x) / (unsigned long)(c->wbuf_pagesize)) * (unsigned long)(c->wbuf_pagesize) )
+#define PAGE_MOD(x) ( (unsigned long)(x) % (unsigned long)(c->wbuf_pagesize) )
+#else
#define PAGE_DIV(x) ( (x) & (~(c->wbuf_pagesize - 1)) )
#define PAGE_MOD(x) ( (x) & (c->wbuf_pagesize - 1) )
+#endif
+
int jffs2_flash_writev(struct jffs2_sb_info *c, const struct kvec *invecs, unsigned long count, loff_t to, size_t *retlen, uint32_t ino)
{
struct kvec outvecs[3];
uint32_t outvec_to = to;
/* If not NAND flash, don't bother */
- if (!c->wbuf)
+ if (!jffs2_is_writebuffered(c))
return jffs2_flash_direct_writev(c, invecs, count, to, retlen);
down_write(&c->wbuf_sem);
erase block. Anything else, and you die.
New block starts at xxx000c (0-b = block header)
*/
- if ( (to & ~(c->sector_size-1)) != (c->wbuf_ofs & ~(c->sector_size-1)) ) {
+ if (SECTOR_ADDR(to) != SECTOR_ADDR(c->wbuf_ofs)) {
/* It's a write to a new block */
if (c->wbuf_len) {
D1(printk(KERN_DEBUG "jffs2_flash_writev() to 0x%lx causes flush of wbuf at 0x%08x\n", (unsigned long)to, c->wbuf_ofs));
{
struct kvec vecs[1];
- if (jffs2_can_mark_obsolete(c))
+ if (!jffs2_is_writebuffered(c))
return c->mtd->write(c->mtd, ofs, len, retlen, buf);
vecs[0].iov_base = (unsigned char *) buf;
loff_t orbf = 0, owbf = 0, lwbf = 0;
int ret;
- /* Read flash */
- if (!jffs2_can_mark_obsolete(c)) {
-
- if (jffs2_cleanmarker_oob(c))
- ret = c->mtd->read_ecc(c->mtd, ofs, len, retlen, buf, NULL, c->oobinfo);
- else
- ret = c->mtd->read(c->mtd, ofs, len, retlen, buf);
-
- if ( (ret == -EBADMSG) && (*retlen == len) ) {
- printk(KERN_WARNING "mtd->read(0x%zx bytes from 0x%llx) returned ECC error\n",
- len, ofs);
- /*
- * We have the raw data without ECC correction in the buffer, maybe
- * we are lucky and all data or parts are correct. We check the node.
- * If data are corrupted node check will sort it out.
- * We keep this block, it will fail on write or erase and the we
- * mark it bad. Or should we do that now? But we should give him a chance.
- * Maybe we had a system crash or power loss before the ecc write or
- * a erase was completed.
- * So we return success. :)
- */
- ret = 0;
- }
- } else
+ if (!jffs2_is_writebuffered(c))
return c->mtd->read(c->mtd, ofs, len, retlen, buf);
+ /* Read flash */
+ down_read(&c->wbuf_sem);
+ if (jffs2_cleanmarker_oob(c))
+ ret = c->mtd->read_ecc(c->mtd, ofs, len, retlen, buf, NULL, c->oobinfo);
+ else
+ ret = c->mtd->read(c->mtd, ofs, len, retlen, buf);
+
+ if ( (ret == -EBADMSG) && (*retlen == len) ) {
+ printk(KERN_WARNING "mtd->read(0x%zx bytes from 0x%llx) returned ECC error\n",
+ len, ofs);
+ /*
+ * We have the raw data without ECC correction in the buffer, maybe
+ * we are lucky and all data or parts are correct. We check the node.
+ * If data are corrupted node check will sort it out.
+ * We keep this block, it will fail on write or erase and the we
+ * mark it bad. Or should we do that now? But we should give him a chance.
+ * Maybe we had a system crash or power loss before the ecc write or
+ * a erase was completed.
+ * So we return success. :)
+ */
+ ret = 0;
+ }
+
/* if no writebuffer available or write buffer empty, return */
if (!c->wbuf_pagesize || !c->wbuf_len)
- return ret;;
+ goto exit;
/* if we read in a different block, return */
- if ( (ofs & ~(c->sector_size-1)) != (c->wbuf_ofs & ~(c->sector_size-1)) )
- return ret;
-
- /* Lock only if we have reason to believe wbuf contains relevant data,
- so that checking an erased block during wbuf recovery space allocation
- does not deadlock. */
- down_read(&c->wbuf_sem);
+ if (SECTOR_ADDR(ofs) != SECTOR_ADDR(c->wbuf_ofs))
+ goto exit;
if (ofs >= c->wbuf_ofs) {
owbf = (ofs - c->wbuf_ofs); /* offset in write buffer */
kfree(c->wbuf);
}
-#ifdef CONFIG_JFFS2_FS_NOR_ECC
+int jffs2_dataflash_setup(struct jffs2_sb_info *c) {
+ c->cleanmarker_size = 0; /* No cleanmarkers needed */
+
+ /* Initialize write buffer */
+ init_rwsem(&c->wbuf_sem);
+ c->wbuf_pagesize = c->sector_size;
+ c->wbuf_ofs = 0xFFFFFFFF;
+
+ c->wbuf = kmalloc(c->wbuf_pagesize, GFP_KERNEL);
+ if (!c->wbuf)
+ return -ENOMEM;
+
+ printk(KERN_INFO "JFFS2 write-buffering enabled (%i)\n", c->wbuf_pagesize);
+
+ return 0;
+}
+
+void jffs2_dataflash_cleanup(struct jffs2_sb_info *c) {
+ kfree(c->wbuf);
+}
+
int jffs2_nor_ecc_flash_setup(struct jffs2_sb_info *c) {
/* Cleanmarker is actually larger on the flashes */
c->cleanmarker_size = 16;
void jffs2_nor_ecc_flash_cleanup(struct jffs2_sb_info *c) {
kfree(c->wbuf);
}
-#endif
projects / powerpc.git / blobdiff